Ugandan police say the roof of a church has collapsed during a religious service, killing at least 21 people.

Officials say at least 20 others were injured in the incident late Wednesday in a suburb of the capital, Kampala.

They say rescue crews were at the scene, adding that it is unclear how many more people might be trapped under the rubble.

Reports say there was heavy rainfall in the area at the time of the collapse.

Some information for this report was provided by AP and Reuters.